Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 18,875	$ 144,885
Short-term investments	80,233
Restricted Cash	3,073	172
Amounts due from related parties	400	393
Prepaid expenses and other current assets	5,502	8,851
Total current assets	108,083	154,301
Property and equipment, net	12,801	12,372
Long-term deposits	2,076
Total assets	122,960	166,673
Current liabilities:
Accounts payable	3,319	3,192
Amounts due to related parties	16,676	19,407
Accrued expense and other current liabilities	12,049	4,519
Notes payable	387	376
Total current liabilities	32,431	27,494
Other liabilities
Notes payable, net of current portion	10,032	10,323
Other long-term liabilities	236	237
Total liabilities	42,699	38,054
Preferred stock: $0.0001 par value, 50,000,000 shares authorized at September 30, 2022 and December 31, 2021	0	0
Stockholders' equity:
Additional paid-in capital	364,445	357,822
Accumulated other comprehensive income (loss)	(215)
Accumulated deficit	(284,247)	(229,481)
Total stockholders equity	80,261	128,619
Total liabilities and stockholders equity	122,960	166,673
Class A Common Stock [Member]
Stockholders' equity:
Common stock:	278	278
Common Class B [Member]
Stockholders' equity:
Common stock:	$ 0	$ 0